UUID Generator
Generate v4 UUIDs in bulk
What is UUID Generator?
UUID Generator is a free developer utility from Farvixo that lets you generate v4 UUIDs in bulk. Your input is processed locally in the browser — nothing is sent to a server, which matters when the payload is a token, a config file or production data. Free, unlimited, no sign-up.
How to use UUID Generator
Paste your snippet into UUID Generator. It stays on your device, which matters when you are handling tokens, config or production data.
UUID Generator processes the input instantly and points at the exact line when something is malformed, so you can fix it rather than hunt for it.
Copy the result to your clipboard or download it. Free, unlimited and no sign-up.
Frequently Asked Questions
Are these UUIDs actually random?
Yes. They use the platform's cryptographic random number generator, not Math.random(). The distinction matters — a UUID from a weak source can be predictable, which is a real problem if you are using it as anything resembling a token.
Can two UUIDs ever collide?
In principle yes, in practice no. A v4 UUID has 122 random bits; you would need to generate billions per second for a century to have a meaningful chance. Treat collisions as impossible for any real application.
Should I use a UUID as a database primary key?
It is a genuine trade-off. UUIDs let you generate ids without coordinating with the database, which is invaluable in distributed systems. They are also larger than an integer and randomly ordered, which fragments B-tree indexes. UUIDv7, which is time-ordered, addresses that.
Is a UUID a secret?
Not inherently — it is an identifier, not a credential. A v4 UUID is unguessable enough to work as a capability URL for something low-risk, but anything genuinely sensitive needs real authentication.
What is the difference between UUID versions?
v4 is fully random and the usual default. v1 embeds a timestamp and MAC address, which leaks information. v7 is time-ordered, which indexes far better in a database.
What you can use UUID Generator for
- Inspecting or reformatting an API payload while debugging
- Decoding a token or encoded value without pasting it into an unknown website
- Generating test data or identifiers during development
- Validating a config file before it is committed or deployed
UUID Generator at a glance
- Tool
- UUID Generator — Developer Tools
- Purpose
- Generate v4 UUIDs in bulk
- Input
- Text or values you enter directly
- Output
- Processed output you can copy to the clipboard or download
- Processing
- In your browser — files are never uploaded to a server
- Price
- Free, unlimited, no account required
- Limitations
- Bounded by your device's memory and CPU rather than a server quota
Tips for better results
- Because processing is local, it is safe to paste real credentials or production payloads here — nothing is transmitted or logged.
- When parsing fails, the reported line and column point at the first invalid token, which is usually just after the real mistake.
- Bookmark the tool page directly; it loads without an account and works offline once cached.
Common problems and how to fix them
Parsing fails on valid-looking input
Usually a trailing comma, a smart quote pasted from a document, or an unescaped backslash. Check the reported position first.
Output has unexpected whitespace or line endings
The source used CRLF line endings or a non-breaking space. Normalise the input before processing.
Non-English characters come out wrong
The input was not UTF-8. Re-save the source as UTF-8 and paste it again.
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